package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.AddressBook;
import com.sky.entity.OrderDetail;
import com.sky.entity.Orders;
import com.sky.entity.ShoppingCart;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.AddressBookMapper;
import com.sky.mapper.OrderDetailMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ShopCartMapper;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 订单
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService  {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShopCartMapper shopCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、超出配送范围、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shopCartMapper.getUserId(shoppingCart.getUserId());
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        //向订单表插入1条数据
        orderMapper.insert(order);

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据
        shopCartMapper.deletUserId(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 历史订单查询
     * @return
     */
    @Override
    public PageResult selectOrder(int page, int pageSize, Integer status) {
        //分页插件,设置分页
        PageHelper.startPage(page,pageSize);
        //创建OrdersPageQueryDTO对象
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        //加入用户人id
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        //加入状态
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询(根据用户id,状态)
        Page<Orders> pg = orderMapper.pegeOrder(ordersPageQueryDTO);

        List<Orders> list = new ArrayList();

        //查询出订单明细,并封装入OrderVO进行响应
        if (pg != null && pg.getTotal() > 0) {
            for (Orders orders : pg) {
                //订单id
                Long orderId = orders.getId();
                //根据订单id查询订单菜品信息
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderID(orderId);
                //创建OrderVO容器
                OrderVO orderVO = new OrderVO();
                //把订单信息复制入容器
                BeanUtils.copyProperties(orders, orderVO);
                //把订单菜品信息封装入OrderVO
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(pg.getTotal(),list);
    }

    /**
     * 查询订单详细
     * @return
     */
    @Override
    public OrderVO getOdID(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);
        //查询订单对应的菜品/套餐明细
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderID(id);

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetails);

        return orderVO;
    }

    /**
     * 取消订单
     *
     * @return
     */
    @Override
    @Transactional
    public void cancelId(Long id)throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额
            // 支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     */
    @Override
    @Transactional
    public void repetitionId(Long id) {
        // 根据订单id查询当前订单详情
        List<OrderDetail> byOrderID = orderDetailMapper.getByOrderID(id);
        // 将订单详情对象转换为购物车对象
        for (OrderDetail orderDetail : byOrderID) {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail,shoppingCart);
            //补全数据
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());
            // 将购物车对象添加到数据库
            shopCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 订单搜索
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
// 1. 设置分页参数，开启分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        // 查询订单数据
        Page<OrderVO> orders = orderMapper.list(ordersPageQueryDTO);
        for (OrderVO orderVO : orders) {
            // 查询订单明细数据
            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderID(orderVO.getId());
            // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
            StringBuilder sb = new StringBuilder();
            for (OrderDetail orderDetail : orderDetailList) {
                sb.append(orderDetail.getName()).append("*").append(orderDetail.getNumber()).append(";");
            }
            // 将菜品信息字符串设置到orderVO中
            orderVO.setOrderDishes(sb.toString());
            orderVO.setOrderDetailList(orderDetailList);
        }
        return new PageResult(orders.getTotal(), orders.getResult());
    }

/**
 *  各个状态的订单数量统计
 */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     *
     * @return
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        //获取订单id
        Long id = ordersConfirmDTO.getId();
        //根据订单获取订单详细
        Orders orders = orderMapper.getById(id);
        //修改接单状态
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @return
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO)  throws Exception{

        //获取订单id
        Long id = ordersRejectionDTO.getId();
        //根据订单获取订单详细
        Orders orders = orderMapper.getById(id);
        //支付状态
        Integer payStatus = orders.getPayStatus();

        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            String refund =weChatPayUtil.refund(
                    orders.getNumber(),
                    orders.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }

        //更改订单状态
        orders.setStatus(Orders.CANCELLED);
        //修改拒单原因
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        //拒单时间
        orders.setOrderTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 取消订单
     *
     * @return
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @return
     */
    @Override
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @return
     */
    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 处理支付超时订单
     */
    @Override
    public void checkpaytimeout() {
        //查询订单状态是待支付,并且已经超时了的订单id
        //获取十五分钟之前的时间对象
        LocalDateTime time = LocalDateTime.now().plusMinutes(-15);
        //根据两个条件查询订单id:1,订单状态未支付,2.时间在十五分钟之前
        List<Long> ids = orderMapper.getOrderTime(Orders.PENDING_PAYMENT, time);
        //2.将超时订单状态改为已取消
        if (ids != null && ids.size() > 0) {
            for (Long id : ids) {
                //根据id修改订单状态为已取消
                orderMapper.update(Orders.builder().status(Orders.CANCELLED).id(id).build());

            }
        }
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        //////////////////////////////////////////////
        Map map = new HashMap();
        map.put("type", 1);//消息类型，1表示来单提醒
        map.put("orderId", orders.getId());
        map.put("content", "订单号：" + outTradeNo);

        //通过WebSocket实现来单提醒，向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
        ///////////////////////////////////////////////////
    }

    /**
     * 用户催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        // 查询订单是否存在
        Orders orders = orderMapper.getById(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //基于WebSocket实现催单
        Map map = new HashMap();
        map.put("type", 2);//2代表用户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}